205244109 has 24 divisors (see below), whose sum is σ = 339318720. Its totient is φ = 117108288.

The previous prime is 205244101. The next prime is 205244141. The reversal of 205244109 is 901442502.

It is not a de Polignac number, because 205244109 - 2³ = 205244101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205244101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48954 + ... + 52980.

It is an arithmetic number, because the mean of its divisors is an integer number (14138280).

Almost surely, 2^205244109 is an apocalyptic number.

It is an amenable number.

205244109 is a deficient number, since it is larger than the sum of its proper divisors (134074611).

205244109 is a wasteful number, since it uses less digits than its factorization.

205244109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4849 (or 4846 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 205244109 is about 14326.3431831015. The cubic root of 205244109 is about 589.8708028895.

The spelling of 205244109 in words is "two hundred five million, two hundred forty-four thousand, one hundred nine".